public class Shift {
  public static void main(String[] args) {
    int number = 1;
    System.out.printf("2的0次方：%d%n",number);
    System.out.printf("2的1次方：%d%n",number<<1);
    System.out.printf("2的2次方：%d%n",number<<2);
    System.out.printf("2的3次方：%d%n",number<<3);
  }
}

